• DFRobot SEN0237-A Gravity Analog Dissolved Oxygen (DO) Liquid Sensor Kit, 0–20 mg/L Galvanic Probe, 3.3–5.5 V, BNC — For Arduino/Raspberry Pi/ESP32
  • DFRobot SEN0237-A Gravity Analog Dissolved Oxygen (DO) Liquid Sensor Kit, 0–20 mg/L Galvanic Probe, 3.3–5.5 V, BNC — For Arduino/Raspberry Pi/ESP32
  • Gravity analog dissolved oxygen sensor for Arduino/Raspberry Pi, 0–20 mg/L, 3.3–5.5 V, BNC galvanic probe with cable and accessories.
  • DFRobot SEN0237-A dissolved oxygen sensor with galvanic probe, 0–20 mg/L range, 3.3–5.5 V, BNC, compatible with Arduino, Raspberry Pi, and ESP32.
  • DFRobot SEN0237-A Gravity Analog Dissolved Oxygen (DO) Liquid Sensor Kit, 0–20 mg/L Galvanic Probe, 3.3–5.5 V, BNC — For Arduino/Raspberry Pi/ESP32
  • DFRobot SEN0237-A Dissolved Oxygen Sensor with BNC Connector, measuring range 0–20 mg/L.
  • DFRobot SEN0237-A is a galvanic dissolved oxygen sensor with 0–20 mg/L range, BNC interface, 3.3–5.5 V, compatible with Arduino/Raspberry Pi/ESP32.
  • The Gravity Dissolved Oxygen Sensor V1.0 from DFRobot measures 0–20 mg/L, uses BNC and 3.3–5.5 V, compatible with Arduino, Raspberry Pi, ESP32.
  • DFRobot SEN0237-A Gravity Analog Dissolved Oxygen (DO) Liquid Sensor Kit, 0–20 mg/L Galvanic Probe, 3.3–5.5 V, BNC — For Arduino/Raspberry Pi/ESP32
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DFRobot SEN0237-A Gravity Analog Dissolved Oxygen (DO) Liquid Sensor Kit, 0–20 mg/L Galvanic Probe, 3.3–5.5 V, BNC — For Arduino/Raspberry Pi/ESP32

DFRobot SEN0237-A Gravity Analog Dissolved Oxygen (DO) Liquid Sensor Kit, 0–20 mg/L Galvanic Probe, 3.3–5.5 V, BNC — For Arduino/Raspberry Pi/ESP32

DFRobot

$299.00 USD
$299.00 USD
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Overview

DFRobot SEN0237-A is an analog dissolved oxygen (DO) liquid sensor kit that measures oxygen content in water to assess quality for aquaculture, hydroponics, and environmental monitoring. It pairs a galvanic DO probe (no polarization time) with a Gravity signal converter board (3.3–5.5 V input, 0–3.0 V analog output) for easy connection to Arduino, Raspberry Pi (via ADC HAT), ESP32, and other microcontrollers.

Key Features

  • Galvanic DO probe — ready-to-use, no polarization delay.

  • Low maintenance — replaceable membrane cap and refillable electrolyte.

  • Wide compatibility — Gravity interface, 3.3–5.5 V supply, 0–3.0 V analog output.

  • Practical range — measures 0–20 mg/L DO with fast response (≤90 s to 98% at 25 °C).

  • Rugged build — 0–50 PSI pressure rating and 2 m cable with BNC connector.

Specifications

Dissolved Oxygen Probe

  • Type: Galvanic

  • Measurement Range: 0–20 mg/L

  • Response Time: ≤90 s to 98% (25 °C)

  • Pressure Range: 0–50 PSI

  • Service Life: ~1 year (typical use)

  • Maintenance:

    • Membrane cap replacement: 1–2 months (muddy water), 4–5 months (clean water)

    • Filling solution replacement: ~1 month

  • Cable Length: 2 m

  • Connector: BNC

Signal Converter Board

  • Operating Voltage: 3.3–5.5 V

  • Output: 0–3.0 V analog

  • Probe Connector: BNC

  • Signal Connector: Gravity Analog (PH2.0-3P)

  • Dimensions: 42 × 32 mm

Compatibility & Applications

  • MCUs/Boards: Arduino, ESP32, and Raspberry Pi (requires ADC module/HAT).

  • Use Cases: Aquaculture, hydroponics, environmental water testing, education, lab experiments.

Important Notes & Safety

  • Electrolyte required: Filling solution is not included due to air-transport regulations. Use 0.5 mol/L NaOH; fill the membrane cap before first use.

  • Corrosive liquid: Wear gloves; if contact occurs, rinse skin thoroughly with water.

  • Handle with care: The oxygen-permeable membrane is fragile—avoid sharp objects.

  • Measurement tip: The probe consumes a small amount of oxygen; gently stir the sample for uniform readings.

Package Contents

  • Galvanic Dissolved Oxygen Probe with Membrane Cap ×1

  • Spare Membrane Cap ×1

  • Signal Converter Board ×1

  • Gravity Analog Sensor Cable ×1

  • Waterproof Gasket ×2

  • Screw Cap for BNC Connector ×1

  • Plastic Dropper ×2

Details

DFRobot SEN0237 DO Sensor, A package contains a Galvanic Dissolved Oxygen Probe with Membrane Cap and various accessories like spare parts and cables.

DFRobot SEN0237 DO Sensor, The Gravity Dissolved Oxygen Sensor V1.0 by DFRobot is compact and includes a measurement scale for size reference.

DFRobot Gravity Dissolved Oxygen Sensor V1.0 by DFRobot, featuring a compact design with measurement scale for size reference.

DFRobot SEN0237 DO Sensor, The measurement tip suggests consuming a small amount of oxygen and stirring the sample gently for uniform readings.

DFRobot SEN0237 DO Sensor, The practical range for measuring dissolved oxygen is 0-20 mg/L with a fast response time of ≤90 seconds.

DFRobot SEN0237 DO Sensor, Galvanic dissolved oxygen probe for measuring 0-20mg/L with response time ≤90s, suitable for Arduino, ESP32, and Raspberry Pi.

DFRobot SEN0237 DO Sensor, Fill the membrane cap with 0.5 mol/L NaOH before first use.

DFRobot SEN0237 DO Sensor, The measurement range for practical purposes is between 0-20 milligrams per liter, with a response time of less than 90 seconds.

DFRobot SEN0237 DO Sensor, Package contains various components including a galvanic dissolved oxygen probe, signal converter board, and other accessories.

DFRobot SEN0237 DO Sensor, The DFRobot SEN0237 dissolved oxygen sensor connects to a DFRduino UNO v3.0 via analog input, using a probe and cable setup to measure oxygen levels in water for environmental monitoring.

DFRobot SEN0237 Dissolved Oxygen Sensor V1.0 connects to a DFRduino UNO v3.0 via analog input. It includes a probe connected by a cable, with power and signal wires. VCC, GND, and signal pins link to the microcontroller’s 5V, GND, and A0. This setup measures dissolved oxygen in water, ideal for environmental monitoring.

 

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